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US10917887B2 - Information transmission method and device based on sweeping block - Google Patents

Information transmission method and device based on sweeping block Download PDF

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Publication number
US10917887B2
US10917887B2 US16/323,339 US201716323339A US10917887B2 US 10917887 B2 US10917887 B2 US 10917887B2 US 201716323339 A US201716323339 A US 201716323339A US 10917887 B2 US10917887 B2 US 10917887B2
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Prior art keywords
sweeping
block
data transmission
downlink
symbols
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US16/323,339
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US20190254026A1 (en
Inventor
Xing Liu
Feng Bi
Junfeng Zhang
Peng Hao
Bo Gao
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ZTE Corp
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ZTE Corp
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0014Three-dimensional division
    • H04L5/0023Time-frequency-space

Definitions

  • the present disclosure relates to, but is not limited to, the field of mobile communications and, in particular, relates to an information transmission method and device based on a sweeping block.
  • a carrier frequency such as 28 GHz, 45 GHz and 70 GHz
  • 4G fourth-generation
  • This type of high frequency channel has defects of a larger free propagation loss, being easily absorbed by oxygen and being affected by rain attenuation, which seriously affects coverage performance of the high frequency communication system.
  • the carrier frequency of the high frequency communications has a shorter wavelength, so more antenna elements can be accommodated in per unit area. The more antenna elements mean that a beamforming method can be adopted to improve antenna gains, thereby ensuring the coverage performance of the high frequency communications.
  • the transmitting end may concentrate transmit energy in a certain direction, and the transmit energy is small or no in other directions, that is, each beam has its own directivity and can only cover the terminals in a certain direction.
  • the transmitting end, the base station needs to transmit beams in dozens or even hundreds of directions to implement a full coverage.
  • the preliminary measurement and identification of beam directions are performed in the initial access process of the terminal to the network, and all the transmitting beams of the base station are polled in a time period for the terminal to measure and identify a preferred beam or port.
  • a downlink (DL) beam sweeping subframe includes several continuous beam sweeping blocks (such as grid areas in FIG. 1 ).
  • a synchronization signal (SS) and system information (SI) may be transmitted on multiple beams or ports according to the number of radio frequency links of the base station, and a beam reference signal (BRS)/port reference signal may also be transmitted.
  • the terminal identifies the preferred downlink transmit beam or port and acquires the basic information of the cell and access configuration information by measuring the synchronization signals, acquiring the system information and measuring the optional reference signals, to access the network. Similarly, there are also consecutive sweeping blocks in the uplink.
  • the required beamforming gains also increase, which means that a more “narrow” beam is required to cover the expected range.
  • the number of beams may be dozens or even hundreds, and the number of the required beam sweeping blocks is increased accordingly, so the total length of the beam sweeping subframe will be too long.
  • the directions of the transmit beams are polled in a pre-defined order within the beam sweeping subframe and cannot meet the different data transmission requirements of different beams, that is, the data subframe configuration of the beam direction in which data may be sent needs to wait for the completing of the subframe sweeping.
  • the time occupied by polling all the beams (the beam sweeping subframe) is too long, the flexibility and efficiency of beam transmission of data are affected and a latency of traffic transmission is also increased.
  • the transmission direction frequently changes in the sweeping block the hardware costs and overheads of the base station are increased.
  • Embodiments of the present disclosure provide an information transmission method and device based on a sweeping block to improve flexibility and efficiency of data beam transmission and reduce a latency of traffic transmission.
  • the embodiments of the present disclosure provide an information transmission method based on a sweeping block.
  • the method includes: configuring part of or all of symbols of a data transmission subframe within a sweeping period to the sweeping block; and carrying a sweeping signal channel in the sweeping block for transmission.
  • the sweeping signal channel refers to signals or signals and channels to be transmitted by polling all ports or beams.
  • the embodiments of the present disclosure further provide an information transmission device based on a sweeping block.
  • the device includes a configuration module and a transmission module.
  • the configuration module is configured to configure part of or all symbols of a data transmission subframe within a sweeping period to a sweeping block.
  • the transmission module is configured to carry a sweeping signal channel in the sweeping block for transmission.
  • the sweeping signal channel refers to a signal or a signal and channel to be transmitted by polling all ports or beams.
  • the embodiments of the present disclosure further provide an electronic device, including the information transmission device based on the sweeping block described above.
  • the embodiments of the present disclosure further provide an electronic device, including a processor and a memory storing instructions executable by the processor.
  • the instructions when executed by the processor, perform the following operations: configuring part of or all symbols of a data transmission subframe within a sweeping period as the sweeping block; and carrying a sweeping signal channel in the sweeping block for transmission.
  • the sweeping signal channel refers to a signal or a signal and channel to be transmitted by polling all ports or beams.
  • the embodiments of the present disclosure further provide a machine-readable medium configured to store computer-executable instructions for executing the information transmission method based on the sweeping block described above when executed by a processor.
  • the embodiments of the present disclosure provide an information transmission method and device based on a sweeping block, a new beam/port sweeping resource structure is defined and sweeping blocks are distributed and inserted into the data transmission subframe, that is, the some or all symbols of the data transmission subframe within the sweeping period are configured as the sweeping block.
  • a downlink control region in the data transmission subframe may schedule resources in the sweeping block other than the sweeping signal channel to transmit data on the same port or the same beam.
  • a sweeping subframe includes a reduced number of sweeping blocks and a total length of the sweeping subframe is reduced, thereby reducing an impact on a traffic transmission latency due to the transmission of the sweeping subframe.
  • the embodiments of the present disclosure may support that symbols outside a reserved region in the data transmission subframe are configured as the sweeping block so that the sweeping block does not affect the transmission of original port control information, that is, important information may be transmitted on the predetermined port, which greatly improves system stability.
  • FIG. 1 is a structure diagram of a continuous sweeping subframe in the existing art
  • FIG. 2 is a flowchart of an information transmission method based on a sweeping block according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram illustrating an internal structure of a sweeping block according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram illustrating a configuration of a sweeping block according to an embodiment 1;
  • FIG. 5 is a schematic diagram illustrating a configuration of a downlink sweeping block according to an embodiment 2;
  • FIG. 6 is a schematic diagram illustrating another configuration of the downlink sweeping block according to the embodiment 2;
  • FIG. 7 is a schematic diagram illustrating a configuration of an uplink sweeping block according to the embodiment 2;
  • FIG. 8 is a schematic diagram illustrating another configuration of the uplink sweeping block according to the embodiment 2;
  • FIG. 9 is a schematic diagram illustrating a configuration of sweeping blocks according to an embodiment 3.
  • FIG. 10 is a schematic diagram illustrating another configuration of the sweeping blocks according to the embodiment 3.
  • FIG. 11 is a schematic diagram illustrating yet another configuration of the sweeping blocks according to the embodiment 3.
  • FIG. 12 is a schematic diagram illustrating a configuration of sweeping blocks according to an embodiment 4.
  • FIG. 13 is a schematic diagram illustrating a configuration of sweeping blocks according to an embodiment 5;
  • FIG. 14 is a schematic diagram illustrating a configuration of sweeping blocks according to an embodiment 6;
  • FIG. 15 is a schematic diagram illustrating a configuration of sweeping blocks according to an embodiment 7;
  • FIG. 16 is a schematic diagram illustrating a configuration of sweeping blocks according to an embodiment 8.
  • FIG. 17 is a schematic diagram illustrating a configuration of sweeping blocks according to an embodiment 9.
  • FIG. 18 is a schematic diagram illustrating another configuration of the sweeping blocks according to the embodiment 9.
  • FIG. 19 is a schematic diagram illustrating a configuration of sweeping blocks according to an embodiment 10.
  • FIG. 20 is a schematic diagram illustrating a mapping structure of synchronization signal (SS) blocks under a subcarrier spacing of 240 kHz according to an embodiment 11;
  • FIG. 21 is a schematic diagram illustrating a mapping structure of SS blocks under a subcarrier spacing of 120 kHz according to the embodiment 11;
  • FIG. 22 is a schematic diagram illustrating a mapping structure of SS blocks under a subcarrier spacing of 30 kHz according to the embodiment 11;
  • FIG. 23 is a schematic diagram illustrating a mapping structure of SS blocks under a subcarrier spacing of 15 kHz according to the embodiment 11;
  • FIG. 24 is a schematic diagram illustrating another mapping structure of SS blocks under the subcarrier spacing of 15 kHz according to the embodiment 11;
  • FIG. 25 is a schematic diagram illustrating another mapping structure of SS blocks under the subcarrier spacing of 240 kHz according to the embodiment 11;
  • FIG. 26 is a schematic diagram illustrating a mapping structure of SS blocks under a subcarrier spacing of 240 kHz according to an embodiment 12;
  • FIG. 27 is a schematic diagram of SS blocks across a boundary of a 0.5 ms duration according to the embodiment 12;
  • FIG. 28 is a schematic diagram illustrating a mapping structure of SS blocks according to an embodiment 13;
  • FIG. 29 is a schematic diagram illustrating a mapping structure of SS blocks according to an embodiment 14.
  • FIG. 30 is a block diagram of an information transmission apparatus based on a sweeping block according to an embodiment of the present disclosure.
  • a sweeping time interval may also be referred to as a sweeping subframe or a beam sweeping time interval or beam sweeping subframe; and a data transmission subframe may also be referred to as a data transmission time interval.
  • the sweeping time interval may be one or more continuous data transmission subframes.
  • a sweeping time block may also be referred to as a sweeping block or a beam sweeping time block or a beam sweeping block.
  • beam and the term “port” have the same meaning, which are not distinguished and may be commonly used herein.
  • An embodiment of the present disclosure provides an information transmission method based on a sweeping block. As shown in FIG. 2 , the information transmission method based on the sweeping block in the embodiment includes the steps described below.
  • step 201 part of or all symbols of a data transmission subframe within a sweeping period are configured as a sweeping block.
  • step 202 a sweeping signal channel is carried in the sweeping block for transmission.
  • the sweeping signal channel refers to a signal or a signal and channel need to be transmitted by polling all ports or beams.
  • the step 201 may include configuring part of or all symbols of at least one data transmission subframe within the sweeping period as at least one sweeping block.
  • Part of the symbols of one data transmission subframe within the sweeping period may be configured as one or more sweeping blocks.
  • all symbols of one data transmission subframe within the sweeping period may be configured as one or more sweeping blocks.
  • part of or all symbols of each of multiple data transmission subframes within the sweeping period may be configured as one sweeping block.
  • part or all symbols of each of multiple data transmission subframes within the sweeping period may be configured as multiple sweeping blocks. That is, one data transmission subframe within the sweeping period may be configured with one or more sweeping blocks, and each sweeping block occupies at least one symbol.
  • each of multiple data transmission subframes within the sweeping period is configured with at least one sweeping block, and each sweeping block occupies at least one symbol.
  • the step 201 may include: for each of one or more data transmission subframes within the sweeping period, configuring symbols, outside a reserved region, of the data transmission subframe as one or more sweeping blocks.
  • the data transmission subframe configured with the sweeping block has any one of the following structures:
  • the downlink control region, the downlink sweeping block, the guard period, the uplink sweeping block and the uplink control region each comprise at least one symbol such as an orthogonal frequency division multiplexing (OFDM) symbol.
  • OFDM orthogonal frequency division multiplexing
  • the step of configuring the symbols, outside the reserved region, of each of at least one data transmission subframe within the sweeping period as one or more sweeping blocks may include: configuring all symbols except the reserved region of each of at least one continuous data transmission subframe within the sweeping period as the sweeping block. After all the symbols except the reserved region of the at least one continuous data transmission subframe within the sweeping period are configured as the sweeping block, the at least one continuous data transmission subframe configured with the sweeping block constitutes a sweeping time interval.
  • the reserved region may include at least one of the downlink control region and the uplink control region.
  • the step in which part of or all symbols of the data transmission subframe within the sweeping period are configured as the sweeping block may include: configuring all symbols of each of at least one continuous data transmission subframe within the sweeping period as the sweeping block. After all the symbols of each of the at least one continuous data transmission subframe within the sweeping period are configured as the sweeping block, the at least one continuous data transmission subframe configured with the sweeping block constitute the sweeping time interval.
  • a length of the sweeping time interval is a multiple of a length of the data transmission subframe, unlike the existing art in which the length of the sweeping time interval is an arbitrary number irrelevant to the length of the data transmission subframe.
  • Such configuration does not change a potential position of a start point of the data transmission subframe, that is, a terminal may determine the starting point of the subframe according to a fixed subframe length and performs control channel blind detection at the starting point of the subframe.
  • the sweeping time interval is not directly related to the length of the data transmission subframe.
  • the starting position of the data transmission subframe is no longer fixed if the sweeping time interval is inserted, and the terminal needs to perform the blind detection by symbols to ensure that the control channel at the starting point of the data transmission subframe is not missed.
  • Blind detection complexity is increased for the terminal.
  • the step of configuring part or all symbols of the data transmission subframe within the sweeping period as the sweeping block may include: configuring part of or all symbols of the data transmission subframe within the sweeping period as one sweeping block. That is, merely one sweeping block is configured in the data transmission subframe.
  • a port or beam of the data transmission subframe is a subset or a full set of ports or beams of the one sweeping block.
  • the sweeping period may refer to a time period during which the sweeping signal channel transmitted by polling all ports or beams for one time, and the sweeping period includes a plurality of subframes.
  • the sweeping period is predefined as any one of 5 ms, 10 ms, 20 ms, 40 ms and 80 ms.
  • the sweeping period includes at least one sweeping block, and each sweeping block is used for transmitting the sweeping signal channel of at least one port and occupies at least one symbol.
  • the sweeping signal channel is transmitted on all ports or beams in the sweeping period.
  • the sweeping block includes at least one of the downlink sweeping block and the uplink sweeping block; and the sweeping signal channel includes at least one of an uplink sweeping signal channel and a downlink sweeping signal channel.
  • the downlink sweeping block carries the downlink sweeping signal channel used for at least one of: a cell search, and measurement and identification of a downlink port or beam.
  • the downlink sweeping signal channel includes at least one of the following corresponding to the downlink port or beam: a downlink synchronization signal, system information and a downlink port reference signal.
  • the uplink sweeping block carries the uplink sweeping signal channel used for at least one of: uplink access, and measurement and identification of an uplink port or beam.
  • the uplink sweeping signal channel includes at least one of the followings corresponding to the uplink port or beam: an uplink random access request signal and an uplink port reference signal.
  • the sweeping signal channel in the sweeping block is further used for indicating time domain position information of the sweeping block.
  • the time domain position information includes at least one of: a frame in which the sweeping block is located, a subframe in which the sweeping block is located, and a position of the sweeping block in the subframe.
  • the position of the sweeping time block in the subframe refers to information on which symbols of the subframe are occupied by the sweeping block, or offset information between the sweeping block and a boundary of the subframe in which the sweeping block is located.
  • the data transmission subframe may be used for transmitting or receiving, on a specific port or beam, data of at least one terminal.
  • the data transmission subframe may have any one of the following structures:
  • the downlink control region, the downlink data region, the guard period, the uplink data region and the uplink control region each include at least one symbol such as the orthogonal frequency division multiplexing (OFDM) symbol.
  • OFDM orthogonal frequency division multiplexing
  • a structure of the data transmission subframe configured with the sweeping block may include the downlink control region and the downlink sweeping block or include the downlink control region, the downlink sweeping block and the downlink data region.
  • the structure of the data transmission subframe configured with the sweeping block may include the downlink control region, the guard period and the uplink sweeping block or include the downlink control region, the guard period, the uplink sweeping block and the uplink data region.
  • the structure of the data transmission subframe configured with the sweeping block may be the combination of the downlink control region, the downlink sweeping block, the guard period and the uplink control region, or may be a combination of the downlink control region, the downlink sweeping block, the downlink data region, the guard period and the uplink control region, or may be a combination of the downlink control region, the downlink data region, the guard period, the uplink sweeping block and the uplink control region, or may be a combination of the downlink control region, the downlink data region, the guard period, the uplink sweeping block and the uplink control region, or may be a combination of the downlink control region, the downlink data region, the guard period, the uplink control region and the uplink sweeping block.
  • the structure of the data transmission subframe configured with the sweeping block may be the combination of the downlink control region, the guard period, the uplink sweeping block and the uplink control region, or may be a combination of the downlink control region, the guard period, the uplink sweeping block, the uplink data region and the uplink control region.
  • the structure of the data transmission subframe configured with the sweeping block may be the combination of the downlink control region, the downlink sweeping block, the guard period, the uplink sweeping block and the uplink control region, or may be a combination of the downlink control region, the downlink sweeping block, the downlink data region, the guard period, the uplink sweeping block and the uplink control region, or may be a combination of the downlink control region, the downlink sweeping block, the guard period, the uplink sweeping block, the uplink data region and the uplink control region, or may be a combination of the downlink control region and the downlink sweeping block, the downlink data region, the guard period, the uplink sweeping block, the uplink data region and the uplink control region, or may be a combination of the downlink control region and the downlink sweeping block, the downlink data region, the guard period, the uplink sweeping block, the uplink data region and the uplink control region, or may be a combination of the downlink control region, the downlink data region, the guard
  • the method may further include carrying downlink data or uplink data in the sweeping block for transmission.
  • the downlink data or the uplink data is assigned or scheduled in the downlink control region within a subframe or a symbol prior to the sweeping block.
  • a port or beam used by the downlink control region constitutes a subset or a full set of ports or beams of the sweeping block to which the downlink data belongs.
  • a port or beam used by the downlink data or the uplink data is the subset or the full set of ports or beams of the sweeping block, and the downlink data or the uplink data is carried using a resource not occupied by the sweeping signal channel within the sweeping block.
  • the downlink data or the uplink data is frequency division multiplexed with the sweeping signal channel within the sweeping block.
  • the downlink control includes uplink scheduling information or downlink assignment information of data transmission resources within the sweeping block.
  • the data transmission resources within the sweeping block and data transmission resources in the data transmission subframe are jointly assigned and indicated or independently assigned and indicated.
  • the downlink control further includes at least one of time domain position information and frequency domain position information of the data transmission resources within the sweeping block.
  • the time domain position information of the data transmission resources within the sweeping block is described by any one of the following:
  • an absolute time offset between the sweeping block and a data transmission subframe in which the downlink control is located where the absolute time offset may be a number of offset symbols or absolute offset time;
  • the position of the sweeping time block in the subframe refers to the information of symbols occupied by the sweeping block in the subframe, or the offset information between the sweeping block and the boundary of the subframe in which the sweeping block is located.
  • the sweeping blocks are mapped at equal intervals onto the data transmission subframe.
  • the sweeping blocks are mapped at equal intervals onto the data transmission subframe in the manner described below.
  • All sweeping blocks within the sweeping period T are divided into N groups, each of the N groups is mapped onto the data transmission subframe at a fixed time interval, and adjacent sweeping blocks in each of the N groups are mapped at equal intervals.
  • all adjacent sweeping blocks within the sweeping period are mapped at equal intervals.
  • all adjacent sweeping blocks are mapped at equal intervals.
  • N may be a positive integer.
  • each of the N groups of sweeping blocks being mapped onto the data transmission subframe at the fixed time interval may refer to that an offset between starting boundaries of first sweeping blocks within adjacent two groups of sweeping blocks is fixed.
  • the offset between the starting boundaries of the first sweeping blocks within the adjacent two groups of sweeping blocks is equal to a ratio of the sweeping period T to N.
  • FIG. 3 is a schematic diagram illustrating an internal structure of a sweeping block according to an embodiment of the present disclosure.
  • FIG. 3( a ) is a structural example of a downlink sweeping block
  • FIG. 3( b ) is a structural example of an uplink sweeping block.
  • the downlink sweeping block occupies 2 symbols; a synchronization signal (SS) and system information (SI) are time-division multiplexed and each occupy one symbol in time domain and 6 resource blocks (RBs) in frequency domain.
  • the SS and the SI may also occupy different numbers of RBs.
  • a beam reference signal (BRS) and the SS/SI are frequency division multiplexed and the BRS is used by the terminal for measurement and identification of a beam.
  • Other multiplexing manners are also available to the sweeping block.
  • the SS, the SI and the BRS are time division multiplexed, or the SS, the SI and the BRS are frequency division multiplexed or multiplexed in other manners.
  • the downlink sweeping block may not necessarily include all the downlink sweeping signal channels (i.e., the synchronization signal (SS), the system information (SI) and the beam reference signal (BRS)). Some downlink sweeping blocks may only include part of signals or channels in the downlink sweeping signal channels.
  • the downlink sweeping block used for an initial access may only include the SS and the SI; the downlink sweeping block used for subsequent beam tracking may include merely the BRS and only supports the terminal to measure and identify a downlink beam.
  • downlink sweeping block including a part of downlink sweeping signal channels are also possible.
  • the embodiments are described below by using an example in which all the three signals or channels are included in the downlink sweeping signal channel.
  • the case where the downlink sweeping signal channel only includes part of the three signals or channels also falls within the scope of the present application.
  • RACH represents a random access request resource and BRS is an uplink beam reference signal.
  • the RACH and the BRS in FIG. 3( b ) are frequency division multiplexed.
  • the present application does not exclude other multiplexing manners.
  • the uplink sweeping block may also include merely one of the RACH and the BRS, for example, only include the BRS for uplink beam tracking.
  • the embodiments are described below by using an example in which both the RACH and the BRS are included.
  • the case where the uplink sweeping signal channel only includes part of the two signals or channels also falls within the scope of the present application.
  • a downlink sweeping block described in the embodiment is configured as shown in FIG. 4 .
  • a structure of a data transmission subframe includes a downlink control region plus a downlink data region.
  • One sweeping/sync period (such as 5 ms) includes multiple downlink (DL) data transmission subframes, and ports or beams used by these downlink data transmission subframes are dynamically scheduled according to traffic transmission requirements. That is, when downlink data is to be transmitted in a certain port or beam direction, one downlink data transmission subframe is configured for sending a downlink control and downlink data corresponding to the certain port.
  • DL downlink
  • these sweeping blocks are used for the sweeping signal channel transmission by polling all ports, that is, the sweeping signal channel needs to be transmitted for at least one time on each port or beam within the multiple sweeping blocks.
  • the sweeping block carries sweeping signal channels used for cell searching (a synchronization signal) and port of beam measurement and identification (such as a beam reference signal).
  • the sweeping signal channel includes the following signals or channels corresponding to the port or beam: the synchronization signal, a system message and the beam reference signal.
  • a structure of the sweeping block shown in FIG. 4 is merely an example. In this example, the sweeping block occupies 2 symbols; the synchronization signal (SS) and system information (SI) are time-division multiplexed and respectively occupy one symbol in time domain and 6 RBs in frequency domain. The SS and the SI may also occupy different numbers of RBs.
  • the beam reference signal (BRS) and the SS/SI are frequency division multiplexed and the BRS is used by a terminal for measuring and identifying a beam.
  • Other multiplexing manners are also available to the sweeping block.
  • the SS, the SI and the BRS are time division multiplexed, or the SS, the SI and the BRS are frequency division multiplexed or multiplexed in other manners.
  • the sweeping signal channel in the sweeping block is further used for indicating time domain position information of the sweeping block.
  • the time domain position information includes a frame in which the sweeping block is located, a subframe in which the sweeping block is located, and a position of the sweeping block in the subframe.
  • the position of the sweeping block in the subframe that is, the symbols occupied by the sweeping block in the subframe, indirectly indicates boundary information of the subframe in which the sweeping block.
  • the time domain position information of the sweeping block is carried in the SI, that is, the SI includes a frame number of the frame in which the sweeping block is located, a subframe number of the subframe in which the sweeping block is located, and position information of the sweeping block in the data transmission subframe.
  • the SI therein carries the following information: a system frame number is 0001001110, a subframe number is 2, and the position of the sweeping block in the subframe is last two symbols (symbols 12 and 13), and a boundary of the corresponding subframe can be determined.
  • the SI carries similar information.
  • the SI indicates that the system frame number is 0001001110, the subframe number is 5, and the position of the sweeping block in the sweeping subframe is first two symbols (symbols 0 and 1).
  • the time domain position information of the sweeping block may alternatively be indicated by other signals within the sweeping signal channel.
  • part of the time domain position information is indicated by the synchronization signal.
  • synchronization signal sequences may be divided into 10 groups and a mapping relationship between the synchronization signal sequence groups and the subframe numbers is predefined.
  • the terminal obtains the subframe number by detecting the synchronization signal.
  • a frequency domain position of the synchronization signal is another possible option for indicating the synchronization signal.
  • the terminal obtains the subframe number by determining the frequency domain position of the synchronization signal. Similar to the above two manners, the position of the sweeping block in the subframe and frame number information may be indicated by the synchronization signal.
  • the time domain position information of the sweeping block may be indicated by the beam reference signal (BRS), the specific scheme is similar to using the synchronization signal, which is not repeated herein.
  • BRS beam reference signal
  • the time domain position information of the sweeping block may also be jointly indicated by any two or three of the SS/SI/BRS.
  • the SI indicates a frame number
  • the SS indicates the subframe number
  • the BRS indicates the position of the sweeping block in the subframe.
  • the SI carries the frame number information
  • each SS sequence group corresponds to the subframe number
  • each BRS sequence group corresponds to the position of the sweeping block in the subframe.
  • Other joint indication manners are also supported.
  • Sweeping signal channels of one or more ports or beams may be transmitted in a same sweeping block, that is, the sweeping signal channels are simultaneously transmitted by multiple radio frequency links within the same sweeping block, and the sweeping signal channels transmitted by different radio frequency links may be the same or different.
  • each downlink data transmission subframe is configured with one sweeping block at the end (two symbols) of the downlink data transmission subframe.
  • the port of the downlink data transmission subframe is a subset or a full set of ports of the sweeping block.
  • the sweeping block includes multiple ports or beams (such as ports 1 to 4) for transmitting the sweeping signal channels of multiple ports or beams.
  • the port of the downlink data transmission subframe is part (such as ports 1 and 2) or all of the multiple ports or beams of the sweeping block.
  • only four downlink data transmission subframes are scheduled and there are eight sweeping blocks, the remaining four sweeping blocks 5 to 8 are included in a last subframe within the sweeping period, that is, all the (eight) symbols of the last downlink data transmission subframe are configured as the sweeping blocks.
  • all the sweeping blocks are configured within the sweeping period and distributed in each downlink data transmission subframe.
  • other resources within the sweeping block except the sweeping signal channel may be used for further carrying the downlink data.
  • the ports of the sweeping blocks 1 to 4 include ports used by the corresponding data transmission subframes
  • the downlink control regions in the downlink data transmission subframes may be used for scheduling the remaining resources in the sweeping blocks to transmit the downlink data.
  • a port or beam used for the downlink control and the downlink data is a subset or a full set of ports or beams of the sweeping block, but it is not limited that the downlink control and the downlink data use a same port or beam.
  • downlink resources (shown in a dotted portion of FIG. 4 ) in the sweeping block may be jointly numbered and scheduled with downlink data channel resources in the original downlink data transmission subframe and adopt a same modulation and coding scheme as the downlink data channel resources.
  • original downlink data transmission resources include 50 RBs and resources which may be used for transmitting the downlink data within the sweeping block include 10 RBs.
  • the 60 RBs are jointly numbered and RB resources for receiving the downlink data are indicated to the terminal.
  • the downlink data of a UE1 occupies RB 3 to RB4, and the downlink data of a UE2 occupies RB60 to RB64.
  • the first 50 RBs and the last 10 RBs have different time domain resources.
  • the last 10 RBs only occupy 2 symbols in the time domain. Therefore, when a base station performs downlink scheduling, the base station needs to indicate a width and a starting position of the RB in the time domain.
  • the base station indicates that a DL subframe 1 occupies 14 symbols in total, the downlink control region occupies 2 symbols, the downlink data region occupies 10 symbols, the sweeping block occupies 2 symbols, the RB3 to RB4 occupied by the UE1 occupy 10 symbols in the time domain, and the RB60 to RB65 occupied by the UE2 occupy 2 symbols (symbols 12 and 13) in the time domain and start from a symbol 12 (the symbols are numbered as symbols 0 to 13).
  • frequency domain positions of the 10 RBs For downlink data resources (10 RBs) within the sweeping block, if frequency domain positions of the 10 RBs has been predefined by a system, merely the RB numbers and the above time domain positions are needed to be indicated to the UE. If the frequency domain positions of the 10 RBs are not predefined by the system, the frequency domain positions of the RBs need to be further indicated. For example, the 10 RBs are distributed at two ends of a system bandwidth, 5 RBs at each end.
  • the manners described in the embodiment are also applicable to a configuration of an uplink sweeping block.
  • the downlink sweeping block shown in FIG. 4 may be replaced with an uplink sweeping block, but the difference is that a guard period for downlink-uplink switching needs to be reserved in front of the uplink sweeping block inserted in the data subframe.
  • a downlink data transmission subframe is taken as an example.
  • each data transmission subframe may also be of other types within a sweeping period.
  • FIG. 5 ( a ) shows a self-contained downlink data transmission subframe, that is, an end of the subframe includes a guard period (GP) and an uplink control region.
  • FIG. 6 ( a ) shows an uplink data transmission subframe.
  • FIG. 5( a ) and FIG. 6( a ) each show merely one subframe, the whole structure of the sweeping period is similar to the structure in the embodiment 1. How to configure a sweeping block in the two data transmission subframes is described below. As shown in FIG.
  • the last two symbols of the downlink portion of the data transmission subframe are configured as a downlink sweeping block 1; or two symbols after the downlink control and before the downlink data are configured as the downlink sweeping block 1.
  • two symbols after the downlink control and before the downlink data may be configured as the downlink sweeping block 1.
  • the downlink control region in the data transmission subframe can still schedule resources within the sweeping block except a sweeping signal channel for transmitting the downlink data of a same port.
  • the relevant scheduling manner is the same as that in the embodiment 1, which is not repeated herein.
  • an uplink sweeping block may also be configured.
  • FIG. 7 shows two configuration forms of configuring one uplink sweeping block in the data transmission subframe structure in FIG. 5( a ) .
  • the uplink sweeping block may be configured before or after an uplink control.
  • FIG. 8 shows two forms of configuring one uplink sweeping block in the data transmission subframe structure in FIG. 6( a ) .
  • the uplink sweeping block may be configured at a beginning of uplink data or end of uplink data.
  • two symbols after the downlink control and before downlink data may be configured as the sweeping block.
  • two symbols before a downlink control region may be configured as the sweeping block.
  • the downlink control cannot schedule resources within the sweeping block other than the sweeping signal channel.
  • the sweeping block may be inserted in downlink data symbols, that is, the sweeping block divides a downlink data region into two parts.
  • the downlink control region can still schedule the resources within the sweeping block except the sweeping signal channel to transmit the downlink data.
  • downlink data transmission resources may be jointly numbered and assigned.
  • the symbol configuration is as follows: 4 symbols for the downlink data, 2 symbols for the sweeping block and 6 symbols for the downlink data. The first 4 symbols are divided into 50 RBs in frequency domain, the sweeping block occupies 10 RBs of downlink data transmission resources in the frequency domain, and the last 6 symbols are divided into 50 RBs in the frequency domain.
  • the three parts are jointly numbered as 110 RB resources (RB0 to RB109).
  • the base station needs to simultaneously indicate the corresponding time-domain size and time-domain starting point of the three parts of RBs.
  • the first part occupies RB0 to RB49, 4 symbols in time domain and starts from the symbol 0;
  • the second part occupies RB50 to RB59, 2 symbols in the time domain and starts from a symbol 4;
  • the third part occupies RB60 to RB109, 6 symbols in the time domain and starts from a symbol 6.
  • a sweeping time interval aggregated by remaining sweeping blocks may be located at any position within a sweeping period (i.e., not limited in a last subframe).
  • all symbols of the Nth data transmission subframe of the sweeping period are configured as a downlink sweeping block to form a downlink sweeping time interval.
  • Other data transmission subframes are still each configured with one downlink sweeping block.
  • the sweeping time interval includes which sweeping blocks may be pre-configured.
  • a data transmission subframe in which no sweeping block is configured may exist within the sweeping period.
  • a manner for configuring the sweeping block in the embodiment is also applicable to the configuration of an uplink sweeping block. It should be noted that a guard period for downlink-uplink switching needs to be reserved before the uplink sweeping block configured in the data transmission subframe.
  • remaining downlink sweeping blocks may constitute one downlink sweeping time interval.
  • Multiple sweeping time intervals may be one sweeping period.
  • FIG. 13 there are two sweeping time intervals 1 and 2 , and the configuration of other data transmission subframes is the same as that in the embodiment 1.
  • the sweeping block configuring manner in the embodiment is also applicable to the configuration of an uplink sweeping block. It should be noted that a guard period for downlink-uplink switching needs to be reserved before the uplink sweeping block configured in the data transmission subframe.
  • merely one sweeping block is configured in the data transmission subframe.
  • Configuring multiple sweeping blocks in each data transmission subframe is also supported, that is, one or more data transmission subframes within a sweeping period are configured with multiple sweeping blocks.
  • the multiple sweeping blocks may be continuously or dispersedly configured.
  • a port of the data transmission subframe is a subset or full set of the ports of one of the multiple sweeping blocks. Accordingly, data transmission resources within the sweeping block including the port of the data transmission subframe may be assigned or scheduled by a downlink control region in the data transmission subframe.
  • FIG. 14 is a schematic diagram illustrating a configuration of a sweeping block according to the embodiment.
  • a total of 10 sweeping blocks are respectively inserted into two data transmission subframes.
  • a downlink data transmission subframe taking a downlink data transmission subframe as an example, a DL subframe 1 and a DL subframe 2 are downlink data transmission subframes configured with the sweeping blocks, and downlink symbols except the downlink control region are all configured as the sweeping blocks.
  • the two downlink data transmission subframes configured with the sweeping blocks constitute a sweeping time interval.
  • a more important region in the data transmission subframe is reserved, and other symbols are configured as the sweeping blocks. That is, the downlink control region currently has more important information (for example, a downlink control is feedback information for previous uplink data or scheduling information for subsequent uplink data) to be transmitted, therefore, the downlink control region is reserved in the data transmission subframe.
  • the reserved region in the data transmission subframe may not be limited to the downlink control region, and other symbols may be reserved.
  • the data transmission subframes are configured according to normal requirements, and the sweeping block continuously occupies some symbols in a certain order. Important data symbol must be reserved and skipped, and the sweeping block occupies the subsequent symbols.
  • the sweeping block configuring manner in the embodiment is also applicable to the configuration of uplink sweeping blocks. It should be noted that a guard period for downlink-uplink switching needs to be reserved before the uplink sweeping blocks configured in the data transmission subframe.
  • two continuous downlink data transmission subframes are configured as follows: all symbols except a downlink control region and an uplink control region are configured as sweeping blocks.
  • the two downlink data transmission subframes constitute a sweeping time interval, and the first downlink data transmission subframe has a self-contained structure, that is, the first downlink data transmission subframe is configured with the uplink control region at the end.
  • the corresponding uplink control region and the guard period (GP) before the uplink control region are skipped.
  • the uplink control in the first downlink data transmission subframe is just an example.
  • the sweeping time interval includes the uplink and downlink control regions, all the uplink and downlink control regions may be reserved or one or more uplink and downlink control regions are selectively reserved.
  • FIG. 16 is a schematic diagram showing that two continuous data transmission subframes within a sweeping period are configured as one sweeping time interval.
  • Original control regions in the two data transmission subframes within the sweeping time interval are reserved, and the reserved region involve symbols occupied by uplink and downlink control regions in the first data transmission subframe and symbols occupied by the downlink control region in the second data transmission subframe.
  • a guard period (GP) for switching from downlink transmission to uplink transmission is configured between the downlink control region and the uplink sweeping blocks.
  • FIG. 17 illustrates a manner for configuring a sweeping block in the embodiment.
  • a relative position of the sweeping time interval within a sweeping period may be arbitrarily configured.
  • the sweeping time interval is configured at the last subframe within the sweeping period.
  • a downlink control in a previous downlink data transmission subframe may schedule downlink data resources within the sweeping block with a same port, that is, resources other than the sweeping signal channel within the sweeping block.
  • the cross-subframe assignment of downlink data is indicated by arrows in FIG. 17 .
  • a port of a DL subframe X is a subset of ports of the sweeping block 1.
  • a downlink control region in the DL subframe X also schedules downlink data transmission resources in the sweeping block 1.
  • the two resources may be respectively scheduled in downlink scheduling.
  • resource allocation, a modulation and coding scheme, a Hybrid Automatic Repeat reQuest (HARQ) process number, a new data indicator (NDI), a redundancy version (RV) and the like are indicated to a UE in a conventional assignment manner.
  • HARQ Hybrid Automatic Repeat reQuest
  • NDI new data indicator
  • RV redundancy version
  • a base station For downlink data assignment in the sweeping block 1 of a sweeping subframe, a base station needs to indicate a time offset between the sweeping subframe in which the sweeping block is located and a data transmission subframe in which the downlink control is located (for example, the time offset is indicated by absolute time or the number of subframes, in an example of indicating the time offset by the number of subframes, the time offset is 5 subframes), and needs to indicate to the UE a relative position of the sweeping block 1 within the sweeping subframe, that is, which symbol resources are occupied by the sweeping block 1. For example, the sweeping block 1 occupies a symbol 0 and a symbol 1. With the above information, the UE may find the time domain position of the sweeping block 1.
  • Frequency domain information for downlink data resources (10 RBs) within the sweeping block, if frequency domain positions of the 10 RBs has been predefined by a system, the base station merely needs to indicate the merely RB numbers and the above time position to the UE; if the frequency domain positions of the 10 RBs are not predefined by the system, specific frequency domain positions of the RBs need to be further indicated.
  • the 10 RBs are the first 5 RBs and the last 5 RBs of a system bandwidth.
  • the modulation and coding scheme, the HARQ process number, the new data indicator (NDI) (indicating whether a currently assigned downlink data resource carries new data or retransmitted data), the redundancy version (RV) and the like for the data transmission within the sweeping block also need to be indicated to the UE.
  • NDI new data indicator
  • RV redundancy version
  • the manner for configuring the sweeping blocks in the embodiment is also applicable to the configuration of uplink sweeping blocks.
  • Uplink data resources within the uplink sweeping block also need to be scheduled by a corresponding downlink control region so that the downlink control region includes both downlink data assignment in the data transmission subframe and uplink data scheduling within the sweeping block.
  • a disadvantage of this case is that a data subframe (such as a DL subframe Z) after the sweeping block cannot schedule the downlink data resources in the corresponding sweeping block, resulting in insufficient use of resources.
  • a data subframe such as a DL subframe Z
  • FIG. 19 is a schematic diagram illustrating a manner for configuring a sweeping block according to the embodiment.
  • All sweeping blocks are aggregated into multiple subframes, that is, the sweeping blocks are still combined into sweeping time intervals but in the multiple subframes. In this manner, the across-subframe assignment of downlink data is also involved (as indicated by arrows in FIG. 19 ). Compared with the structure shown in the embodiment 9, a across-subframe scheduling delay is reduced; on the other hand, a too long sweeping time interval is avoided and a latency for waiting for traffic data scheduling is decreased.
  • a downlink sweeping block may be referred to as a synchronization signal (SS) block, and all SS blocks in a sweeping period are referred to as a SS burst set.
  • a period of the SS burst set is the sweeping period.
  • the embodiment describes a case where SS blocks in a SS burst are further grouped and adjacent SS blocks in each group are mapped at equal intervals.
  • the sweeping blocks in each group are mapped onto continuous data transmission subframes and each have a duration of 0.5 ms, and the adjacent sweeping blocks are mapped at equal intervals.
  • a subcarrier spacing is 240 kHz
  • the 0.5 ms includes 8 data transmission subframes/data transmission slots and each data transmission subframe/data transmission slot has 14 symbols
  • each SS block occupies 4 symbols (which include a synchronization signal and a PBCH, and may also include other reference signals, controls, data and the like).
  • each 14-symbol slot includes two potential SS blocks: one is mapped onto a second symbol to a fifth symbol, and the other is mapped onto a ninth symbol to a twelfth symbol.
  • the above mapping structure is repeated in other slots.
  • the above-mentioned potential SS block means that the SS block mapping positions shown in the figure are all possible resources carrying the SS block. Whether a base station sends the SS block on each SS block resource depends on network requirements.
  • these resources may be configured to transmit at least one of: a downlink control, an uplink control, a guard period (GP), downlink data, a mini-slot and uplink data.
  • a downlink control i.e., the SS burst
  • GP guard period
  • each SS block is mapped onto one data transmission slot without crossing data transmission slots, so that configuration flexibility of the slots is guaranteed and the offset between the adjacent SS blocks is the same, which helps a terminal to combine the adjacent two SS blocks when the terminal detects the synchronization signal or the PBCH. If the offset between the adjacent SS blocks is not fixed, the terminal needs to blindly detect a time domain position of a next SS block, imposing high requirements on combination complexity of the terminal and blocking the combination of the SS blocks.
  • a period of the SS burst is 5 ms
  • the period of the SS burst is 10 ms.
  • the whole SS burst set includes 4 SS bursts ms and each SS burst includes 1 SS block.
  • the SS block may be mapped onto a 7-symbol slot or half a 14-symbol slot. If the SS block is mapped onto half the 14-symbol slot, the SS block may be mapped to the first half slot (mapped to symbols 1 to 4) or a second half slot (mapped to symbols 8 to 11).
  • One of the two potential positions is selected for the SS block, but it is necessary to ensure that relative position of the SS block is the same in all SS bursts.
  • the SS block occupies a position 1 (i.e., the symbols 1 to 4).
  • the period of the SS burst is 10 ms
  • the whole SS burst set (20 ms) includes 2 SS bursts
  • each SS burst includes 2 SS blocks.
  • the embodiment is described by using an example in which the SS block occupies 4 continuous symbols.
  • the SS block may alternatively occupy 5 symbols.
  • the SS blocks are still mapped at equal intervals and a specific structure is shown in FIG. 25 .
  • the SS blocks are respectively mapped onto symbols 2 to 6 and symbols 9 to 13, the adjacent SS blocks in the same SS burst are spaced apart by two symbols, and the offset is still 7 symbols.
  • the embodiment describes another case where SS blocks in one SS burst set are further grouped and adjacent SS blocks in each group are mapped at equal intervals.
  • the embodiment 12 is different from the embodiment 11.
  • an offset between adjacent two SS bursts which are located in different SS burst sets is also 5 ms.
  • the adjacent SS bursts are still at equal intervals in the SS burst set, but the offset between the adjacent two SS bursts which are located in different SS burst sets does not require to be configures as T/N (where T is a sweeping period and N is a number of SS bursts).
  • T is a sweeping period
  • N is a number of SS bursts.
  • the SS blocks in the SS burst set are mapped in relatively concentrated manner.
  • An offset between starting boundaries of first SS blocks in adjacent two SS bursts is 1 ms and each SS burst lasts 0.5 ms.
  • 8 data transmission subframes/data transmission slots are included in 0.5 ms and each data transmission slot has 14 symbols, and each SS block occupies 4 symbols (which includes a synchronization signal and a PBCH, and may also include other reference signals, controls, data and the like).
  • the SS block is mapped onto the data transmission slot in such a manner that each 14-symbol slot includes two potential SS block positions: one is from the second symbol to the fifth symbol, and the other from the ninth symbol to the twelfth symbol.
  • the above mapping structure is repeated in other slots.
  • the above-mentioned potential SS block position means that the SS block mapping positions shown in the figure are the all possible resources carrying the SS block. Whether a base station actually sends the SS block on this resource possible carrying the SS block depends on network requirements.
  • these resources may be configured to transmit at least one of: a downlink control, an uplink control, a guard period (GP), downlink data, a mini-slot and uplink data.
  • a downlink control i.e., the SS burst
  • adjacent two SS blocks are spaced apart by 3 symbols, that is, a time domain offset between starting boundaries of the adjacent two SS blocks is 7 symbols.
  • each SS block is mapped onto one data transmission slot without crossing a boundary of the data transmission slot so that the slot configuration is flexible and the offset between the adjacent SS blocks in the SS burst is the same, which helps a terminal to combine the adjacent two SS blocks in the SS burst when the terminal detects the synchronization signal or the PBCH.
  • the terminal needs to blindly detect a time domain position of a next SS block, imposing high requirements on combination complexity of the terminal and blocking the combination of the SS blocks.
  • the SS burst lasts 0.5 ms.
  • An additional advantage of this configuration is as follows. There are various subcarrier spacings in the new generation of wireless communication system. Under each subcarrier spacing, a first symbol at a boundary of the 0.5 ms duration has a longer cyclic prefix than other symbols. For example, under a subcarrier spacing of 15 kHz, a length of the CP of a symbol 0 and a symbol 7 is approximately 5.2 us and the length of the CP of other symbols (1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12 and 13) is approximately 4.7 us. When a length of the SS burst exceeds 0.5 ms, as shown in FIG.
  • the SS burst will inevitably cross the boundary of the 0.5 ms duration.
  • two SS blocks may be spaced apart by three symbols with short CP lengths, or one symbol with a long CP length and two symbols with short CP lengths.
  • the terminal blindly detects the next SS block, introducing additional blind detection complexity of the terminal. Therefore, a duration of the SS burst may be defined as 0.5 ms herein.
  • a downlink sweeping block may be referred to as a synchronization signal (SS) block and all SS blocks in a sweeping period are referred to as a SS burst set.
  • a period of the SS burst set is the sweeping period.
  • the embodiment describes a case where all adjacent SS blocks in the SS burst set are mapped at equal intervals.
  • a subcarrier spacing is 240 kHz
  • 32 data transmission subframes/data transmission slots are included in 2 ms and each data transmission slot has 14 symbols
  • two SS blocks are mapped in each slot and each SS block occupies 4 symbols (which include a synchronization signal and a PBCH, and may also include other reference signals, controls, data and the like).
  • the SS block is mapped onto the data transmission slot in such a manner that each 14-symbol slot includes two potential SS blocks: one is mapped onto the second symbol to the fifth symbol, and the other is mapped onto a the ninth symbol to the twelfth symbol.
  • the above mapping structure is repeated in other slots.
  • all SS blocks in the SS burst set are mapped onto continuous slots.
  • the above-mentioned potential SS block refers to that the SS block mapping positions shown in the figure are all possible resources carrying the SS block. Whether a base station actually sends the SS block on each SS block resource depends on network requirements.
  • these resources may be configured to transmit at least one of a downlink control, an uplink control, a guard period (GP), downlink data, a mini-slot and uplink data.
  • a downlink control an uplink control
  • a guard period GP
  • Such a mapping manner ensures that, in the SS burst, no SS block is mapped onto multiple data transmission slots by crossing a boundary of the data transmission slot, thereby guaranteeing the flexibility of the slot configuration and the consistency of the offset between the adjacent SS blocks, which helps a terminal to combine the adjacent two SS blocks when the terminal detects the synchronization signal or the PBCH. If the offset between the adjacent SS blocks is different, the terminal needs to blindly detect a time domain position of a next SS block, imposing high requirements on combination complexity of the terminal and blocking the combination of the SS blocks.
  • the embodiment is described by taking the subcarrier spacing of 240 kHz as an example.
  • a basic mapping characteristic is that all the SS blocks in the SS burst set have a same offset, which helps to combine signal channels between SS blocks. Similarly, mapping structures of the SS blocks under other subcarrier spacings may be obtained.
  • a downlink sweeping block may be referred to as a synchronization signal (SS) block and all SS blocks in a sweeping period are referred to as a SS burst set.
  • a period of the SS burst set is the sweeping period.
  • the embodiment describes a case where all adjacent SS blocks are mapped at equal intervals.
  • Each sweeping period includes 20 sweeping blocks/SS blocks, each of which is configured in a corresponding 1 ms.
  • FIG. 29 shows that under a subcarrier spacing of 30 kHz, each SS block occupies symbols 1 to 4 of a first slot in the corresponding 1 ms. In this way, every adjacent two SS blocks in the SS burst set are mapped onto the data transmission slots at equal intervals and adjacent two SS blocks which are located in different SS burst sets are also mapped at equal intervals.
  • Such a mapping manner ensures that an offset between any adjacent two SS blocks is the same (that is, 1 ms), which helps a terminal to combine the adjacent two SS blocks when the terminal detects a synchronization signal or a PBCH. If the offset between the adjacent SS blocks is different, the terminal needs to blindly detect a time domain position of a next SS block, imposing high requirements on combination complexity of the terminal and blocking the combination of the SS blocks.
  • symbols occupied by the SS block in every millisecond may be any continuous 4 symbols as long as relative positions of the symbols occupied by the SS block in every millisecond are the same.
  • the SS block occupies an Mth symbol to an M+3th symbol. In this case, it is also satisfied that all the SS blocks are mapped at equal intervals.
  • the transmission period of the SS block is 1 ms, and the transmission period may also be other values.
  • the embodiment is described by taking the subcarrier spacing of 30 kHz as an example.
  • a basic mapping characteristic is that a same offset is ensured between any adjacent two of all the SS blocks, which helps to combine signal channels between the SS blocks.
  • mapping structures of the SS blocks under other subcarrier spacings may be obtained.
  • the sweeping period includes both a data transmission subframe in which one or more sweeping blocks are configured and a data transmission subframe in which all symbols outside a control region are configured as the sweeping block;
  • the sweeping period includes both the data transmission subframe in which the one or more sweeping blocks are configured and a data transmission subframe in which all symbols are configured as the sweeping block;
  • the sweeping period includes both the data transmission subframe in which all symbols outside the control region are configured as the sweeping block and the data transmission subframe in which all the symbols are configured as the sweeping block;
  • the sweeping period includes the following three types of subframes: the data transmission subframe in which the one or more sweeping blocks are configured, the data transmission subframe in which all symbols except the control region are configured as the sweeping block, and the data transmission subframe in which all the symbols are configured as the sweeping block.
  • FIG. 30 is a block diagram of an information transmission device based on a sweeping block according to an embodiment of the present disclosure. As shown in FIG. 30 , the device includes a configuration module 301 and a transmission module 302 .
  • the configuration module 301 is configured to configure part of or all symbols of a data transmission subframe within a sweeping period as a sweeping block.
  • the transmission module 302 is configured to carry a sweeping signal channel in the sweeping block for transmission.
  • the sweeping signal channel refers to a signal or a signal and channel to be transmitted by polling all ports or beams.
  • the configuration module 301 may be configured to configure part of or all symbols of each of at least one data transmission subframe within the sweeping period as at least one sweeping block.
  • the configuration module 301 may be configured to configure symbols except a reserved region of at least one data transmission subframe within the sweeping period as at least one sweeping block.
  • the data transmission subframe configured with the sweeping block has any one of the following structures:
  • the downlink control region, the downlink sweeping block, the guard period, the uplink sweeping block and the uplink control region each include at least one symbol such an OFDM symbol.
  • the configuration module 301 may be configured to configure all symbols except the reserved region of each of at least one continuous data transmission subframe within the sweeping period as a sweeping block.
  • the configuration module 301 configures all the symbols except the reserved region of each of at least one continuous data transmission subframe within the sweeping period as the sweeping block, the at least one continuous data transmission subframe with the configured sweeping blocks constitute a sweeping time interval.
  • the reserved region may include at least one of the downlink control region and the uplink control region.
  • the configuration module 301 may be configured to configure all symbols of at least one continuous data transmission subframe within the sweeping period as the sweeping block.
  • the configuration module 301 configures all the symbols of at least one continuous data transmission subframe within the sweeping period as the sweeping block, the at least one continuous data transmission subframe with the configured sweeping blocks constitute the sweeping time interval.
  • the configuration module 301 may be configured to configure part of or all symbols of the data transmission subframe within the sweeping period as merely one sweeping block.
  • a port or beam of the data transmission subframe constitutes a subset or a full set of ports or beams of the one sweeping block.
  • the sweeping period may refer to a time period during which the sweeping signal channel is transmitted by polling all ports or beams for one time, and the sweeping period includes a plurality of subframes.
  • the sweeping period is predefined as any one of 5 ms, 10 ms, 20 ms, 40 ms and 80 ms.
  • the sweeping block includes at least one of the downlink sweeping block and the uplink sweeping block; and the sweeping signal channel includes at least one of an uplink sweeping signal channel and a downlink sweeping signal channel.
  • the downlink sweeping block carries the downlink sweeping signal channel used for at least one of: a cell search, and measurement and identification of a downlink port or beam.
  • the downlink sweeping signal channel includes at least one of the followings corresponding to the downlink port or beam: a downlink synchronization signal, system information and a downlink port reference signal.
  • the uplink sweeping block carries the uplink sweeping signal channel used for at least one of: uplink access, and measurement and identification of an uplink port or beam.
  • the uplink sweeping signal channel includes at least one of the followings corresponding to the uplink port or beam: an uplink random access request signal and an uplink port reference signal.
  • the sweeping period includes at least one sweeping block, and each sweeping block is used for transmitting the sweeping signal channel of at least one port and occupies at least one symbol.
  • the sweeping signal channel is transmitted on all ports or beams in the sweeping period.
  • the sweeping signal channel in the sweeping block is further used for indicating time domain position information of the sweeping block.
  • the time domain position information includes at least one of: a frame in which the sweeping block is located, a subframe in which the sweeping block is located, and a position of the sweeping block in the subframe.
  • the position of the sweeping time block in the subframe refers to information on symbols occupied by the sweeping block in the subframe, or offset information between the sweeping block and a boundary of the subframe in which the sweeping block is located.
  • the data transmission subframe is used for transmitting or receiving data of at least one terminal on a specific port or beam.
  • the data transmission subframe has any one of the following structures:
  • the downlink control region, the downlink data region, the guard period, the uplink data region and the uplink control region each include at least one symbol such as the orthogonal frequency division multiplexing (OFDM) symbol.
  • OFDM orthogonal frequency division multiplexing
  • the structure of the data transmission subframe configured with the sweeping block is as described in the method embodiment, which is not repeated herein.
  • the transmission module 302 may be further configured to carry downlink data or uplink data in the sweeping block for transmission.
  • the downlink data or the uplink data is assigned or scheduled in the downlink control region within a subframe or a symbol before the sweeping block.
  • a port or beam used by the downlink control region constitutes a subset or a full set of ports or beams of the sweeping block to which the downlink data belongs.
  • a port or beam used by the downlink data or the uplink data is a subset or a full set of ports or beams of the sweeping block; the downlink data or the uplink data is carried using a resource not occupied by the sweeping signal channel within the sweeping block.
  • the downlink data or the uplink data is frequency division multiplexed with the sweeping signal channel within the sweeping block.
  • a downlink control includes uplink scheduling information or downlink assignment information of data transmission resources within the sweeping block.
  • the data transmission resources within the sweeping block and data transmission resources in the data transmission subframe are jointly assigned and indicated or independently assigned and indicated.
  • the downlink control further includes at least one of time domain position information and frequency domain position information of the data transmission resources within the sweeping block.
  • the time domain position information of the data transmission resources within the sweeping block is described by any one of the following:
  • an absolute time offset between the sweeping block and a data transmission subframe in which the downlink control is located where the absolute time offset may be a number of offset symbols or absolute offset time;
  • the position of the sweeping time block in the subframe refers to the symbol information of the subframe occupied by the sweeping block, or the offset information between the sweeping block and the boundary of the subframe in which the sweeping block is located.
  • the sweeping blocks are mapped at equal intervals onto the data transmission subframes.
  • the sweeping blocks are mapped at equal intervals onto the data transmission subframes in the manner described below.
  • All sweeping blocks within the sweeping period T are divided into N groups, the N groups are mapped onto the data transmission subframe at a fixed time interval, and adjacent sweeping blocks in the each of the N groups of sweeping blocks are mapped at equal intervals.
  • all adjacent sweeping blocks within the sweeping period are mapped at equal intervals.
  • all adjacent sweeping blocks are mapped at equal intervals.
  • the N groups of sweeping blocks being mapped onto the data transmission subframe at the fixed time interval may refer to that an offset between starting boundaries of first sweeping blocks within adjacent two groups is fixed.
  • the offset between the starting boundaries of the first sweeping blocks within the adjacent two groups of sweeping blocks may be equal to a ratio of the sweeping period T to N.
  • the embodiments of the present disclosure further provide an electronic device, including the information transmission apparatus based on the sweeping block described above.
  • the embodiments of the present disclosure further provide an electronic device, including a processor and a memory storing instructions executable by the processor, which, when executed by the processor, perform the following operations: configuring part of or all symbols of a data transmission subframe within a sweeping period as the sweeping block; and carrying a sweeping signal channel in the sweeping block for transmission.
  • the sweeping signal channel refers to a signal or a signal and channel to be transmitted by polling all ports or beams.
  • part of or all symbols of the data transmission subframe within the sweeping period are configured as the sweeping block in the manner described below.
  • Part of or all symbols of at least one data transmission subframe within the sweeping period are configured as at least one sweeping block.
  • part of or all symbols of the data transmission subframe within the sweeping period are configured as the sweeping block in the manner described below.
  • Symbols, except a reserved region, of at least one data transmission subframe within the sweeping period are configured as at least one sweeping block.
  • the instructions when executed by the processor, perform the operation described below.
  • Downlink data or uplink data is carried in the sweeping block for transmission.
  • the downlink data or the uplink data is assigned or scheduled in a downlink control region within a subframe or a symbol before the sweeping block.
  • embodiments of the present disclosure further provide a machine-readable medium configured to store computer-executable instructions for executing the information transmission method based on the sweeping block described above when executed by a processor.
  • the computer-readable medium may include a computer storage medium (or a non-transitory medium) and a communication medium (or a transitory medium).
  • a computer storage medium or a non-transitory medium
  • a communication medium or a transitory medium
  • the term, computer storage medium includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data).
  • the computer storage medium includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory or other memory technologies, a compact disc-read only memory (CD-ROM), a digital versatile disc (DVD) or other optical disc storage, a magnetic cassette, a magnetic tape, a magnetic disk storage or other magnetic storage apparatuses, or any other medium used for storing desired information and accessed by a computer.
  • the communication medium generally includes computer-readable instructions, data structures, program modules or other data in modulated data signals such as carriers or other transmission mechanisms, and may include any information delivery medium.
  • the embodiments of the present application provide the information transmission method and device based on the sweeping block, under the premise of ensuring the same number of sweeping blocks within the sweeping period (i.e., without increasing the sweeping latency), the data transmission is more flexible and remaining resources within the sweeping block are easier to be utilized, thereby improving the resource utilization efficiency.

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  • Time-Division Multiplex Systems (AREA)
  • Small-Scale Networks (AREA)
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US20190254026A1 (en) 2019-08-15
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US11611960B2 (en) 2023-03-21
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CN107734683A (zh) 2018-02-23

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